What became useful in the increased production of food thousands of years ago?

$A$: Improved varieties with genetic variations can be obtained through plant breeding.
$R$: The main objectives of plant breeding are similar to those of animal breeding.

Which of the following can drastically affect the egg and chicken consumption in a country?

Which one is an effective plant insecticide?

Identify the incorrect statements from the following:
$(i)$ Increasing milk production capacity is an objective of animal breeding.
$(ii)$ Breeds of each domesticated animal show variations in their characteristics.
$(iii)$ Out-crossing involves breeding between a male and a female of two different species.
$(iv)$ $A$ mule is an example of interspecific hybridization.

Match the following columns:

List-$I$	List-$II$
$(a)$ Cross-breeding	$(1)$ Apis indica
$(b)$ Interspecific hybridization	$(2)$ Blue Revolution
$(c)$ Honey bee	$(3)$ Mule
$(d)$ Fisheries	$(4)$ Hisardale